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Invisible Threat: Bird Collisions with Glass
28 May
Summary
- Bird-glass collisions kill millions annually in India.
- Most collisions occur at homes, not skyscrapers.
- Citizen science helps track underreported incidents.

Bird-glass collisions, a significant yet undercounted threat, result in millions of bird deaths across India annually.
These incidents, often occurring at common buildings such as homes and schools, are caused by birds' inability to perceive clear or reflective glass. Researchers note that many collisions happen on lower floors, up to the third story.
Specific species like Indian pittas and white-cheeked barbets are particularly vulnerable during migration and breeding seasons. Citizen science platforms are vital for collecting data, with over 110 bird species recorded in such collisions.
While no national estimates exist, initiatives like a 2023 petition to the National Green Tribunal seek to establish bird-safe building guidelines. Experts suggest simple interventions like window patterns can help mitigate this silent danger.